To improve steering stability of a vehicle by sufficiently securing mounting rigidity between a light alloy tire wheel and a hub.
This tire wheel mounting structure is furnished with a plurality of fixing parts 33 made of male screws or female screws and provided with intervals in the circumferential direction on a connecting surface 7a of a wheel mounting part 7 provided on the vehicle, a fixing member 35 made of female screws or male screws free to be screwed with these fixing parts 33 and a mounting hole 23 on which the fixing member 35 is formed free to pass through a wheel disc 9 constituting the tire wheel 3, at least a part in the neighborhood of a peripheral edge of the mounting hole of a connected surface of the wheel disc 9 making contact with and arranged on the connecting surface 7a is formed so as to make contact with the connecting surface in installing the tire wheel 3 on the wheel mounting part 7 by screwing and fastening the fixing part 33 and the fixing member 35 in a state of passing the mounting hole through to the fixing part 33 or the fixing member 35, and a wall groove 23b is formed along the peripheral direction of a hole wall 23a on the cylindrical hole wall 23a forming the mounting hole 23.
Iwa Saki Kokuni
Kawamata Sumio
Masakazu Ito
Shunichi Takahashi
Toshio Takamatsu